be carefull leaving your pump on 24/7, i ran into serious temperature problems in my res. i hava similar set up but with no pots, sitting in a bed via corrogated plastic instead. i made sure to put ample air stones in my bed underneath and cut my water scheduale down to three one hour feeds a day. lights on, hour before lights off, and in the middle during lights on. i do not feed in the dark.(currently on the same light scheduale as yourself) hope this helps, or atleast prevents some temp problems in your res.